固相萃取-高效液相色谱法测定水中灭草松、莠去津和2,4-滴

采用固相萃取富集-高效液相色谱法[1]分析地表水与饮用水中的灭草松,莠去津与2,4-滴。液相色谱条件为V甲醇∶V纯水=60∶40、流速为0.8 mL/min、柱温为30℃、检测波长为225 nm。灭草松、莠去津、2,4-滴检出限分别为0.002 5、0.000 2、0.002 5mg/L,回收率分别为85%-115%、80%-120%和85%-115%。该方法较样品衍生化后用气相色谱法测定简便,可实际应用于水质检测工作。     

紫外/过氧化氢（UV/H2O2）高级氧化工艺在饮用水处理中的应用

通过砂滤池出水后接UV/H2O2高级氧化中试试验设备并投加特征污染物,考察了UV,UV+颗粒活性炭(GAC),UV/H2O2,UV/H2O2+GAC工艺对阿特拉津、嗅味物质及消毒副产物生成量的去除效果,发现UV/H2O2+GAC工艺对土臭素去除效果最好,去除率高达95%以上;对MIB和阿特拉津的去除效果比较接近,去除率在70%以上;UV/H2O2能有效去除消毒副产物前体物、减少消毒副产物的生成。     

农药莠去津的危害与非生物降解研究进展

农药莠去津在世界范围内已经使用了近50年,目前仍是广泛使用的除草剂之一。由于莠去津在环境中残留期较长并具有生物蓄积性,故其对生态环境和人体健康造成的影响具有全球性,已经引起人们的广泛关注。文章介绍了莠去津的性质和危害,并根据莠去津在环境中非生物降解的不同途径,分别从水解、光化学降解和氧化还原降解三方面进行了综述。     

Preliminary studies in removing atrazine,isoproturon and imidacloprid from water by natural sepiolite

Sepiolite is a hydrated magnesium silicate clay with a fibrous structure and binder properties. To calculate the potential use of sepiolite in removing atrazine [2‐chloro‐4‐ethylamino‐6‐isopropilamino‐1,3,5,‐triazine], isoproturon [3‐(4‐isopropylphenyl)‐1,1‐dimethylurea] and imidacloprid [1‐(6‐chloro‐3‐pyridinylmethyl)‐N‐nitroimidazolin‐2‐ylideneamine] from water, the adsorption of atrazine, isoproturon and imidacloprid on sepiolite desiccated at 110 °C from aqueous solution at 25 °C has been studied by using batch experiments. In addition, column experiments were carried out with the sepiolite sample using aqueous solutions of atrazine, isoproturon and imidacloprid at a concentration of 20.0 × 10⁻⁴ cmol dm⁻³. The experimental data points have been fitted to the Langmuir equation to calculate the adsorption capacities (X_m). Values for X_m ranged from 2.70 × 10⁻¹ cmol kg⁻¹ for isoproturon up to 3.97 × 10⁻¹ cmol kg⁻¹ for atrazine. The removal efficiency (R) ranged from 36.7% for isoproturon up to 74.3% for atrazine. The batch experiments show that the sepiolite is more effective in adsorbing atrazine than imidacloprid and isoproturon. The column experiments show that sepiolite might be reasonably used in removing atrazine, the column efficiency being 46%. The data indicate that a readily available and inexpensive Spanish sepiolite can be employed as a filter for contaminated waters with these pesticides, controlling their release to the environment. © 1999 Society of Chemical Industry     

高效液相色谱法检测甘蔗中莠去津的残留量

本论文建立了高效液相色谱快速测定甘蔗中莠去津的方法.甘蔗经加速溶剂萃取仪萃取,应用高效液相色谱仪定量法检测莠去津,建立了定量检测甘蔗中莠去津快速、准确、高灵敏度的方法.经方法学验证,该方法对莠去津最低检出限LOD为0.1 mg/kg.在5.0～100.0μg/mL的线性范围中,相关系数r＞0.9999,平均回收率:89...     

磺草酮与莠去津混用对稗草及反枝苋防效研究

在温室栽培条件下,采用Gowing法评价磺草酮与莠去津混用的联合作用类型。结果表明,二者混用后对稗草和反枝苋的作用效果均明显提高;混合剂对稗草表现出明显的增效作用,在磺草酮400g/hm2,莠去津800、900g/hm2时对稗草和反枝苋的增效作用最为明显,其鲜重抑制率(E-E0)分别为9.1%和9.5%;混合剂对反枝苋作用效果表现为相加作用。     

砜嘧·莠去津19.5%油悬浮剂的高效液相色谱分析

介绍了采用液相色谱法、C_（18）柱,以乙腈和水作为流动相,在254nm波长下对砜嘧·莠去津19.5%油悬浮剂中2种有效成分进行定量分析的方法。该方法的标准偏差分别为0.0089和0.1495;变异系数分别为1.71%和0.78%：平均回收率分别为100.04和99.47：线性相关系数分别为0.9995和0.9998。